I've done the same. I love mushroom soup. I love egg nog. I once tried to put the two together because I had run out of milk.
Now I'm not one to waste things, so I tried to finish it but could only stomach a few mouthfuls. Whatever unholy mixture that turned out to be needed to be buried a minimum of 10 feet deep in a lead container with warnings in every possible language to future generations to leave it the fuck alone.
I tried that once with hot cocoa. my logic was that going from water to milk makes hot cocoa far richer and tastier, even better if it's whole milk. egg nog is even richer and tastier than whole milk, so clearly cocoa nog should be delicious. nope